Why doesn't someone simply answer the guy's question, especially since it is so simple:
Right click on the Vegas ruler above the timeline and select "absolute frames" from the list of options. Then, open the Explorer view from the Vegas View menu. You can then click on any video file that Vegas recognizes, and the length of that file will now be shown, in "frames," along with other useful information about the file, like resolution and framerate. You will see this information in the Vegas Explorer view in the area directly below he list of files.
I hope that actually gives you a useful answer that helps you.
John, as there are so many places our chum COULD read the number of frames per..... what? What as our chum wanting to read? An Event on a timeline? Media in the Project Media Pane? A file exo-Vegas? A trimmed event? An Event in Trimmer?
Hence my question as to WHAT he was wanting to do.
Do you understand what he meant by file? I didn't?
The reason for wanting to know frame number, I build a stereoscopic system using two Sony HDR-CX150's. One camcorder produces .MTS file 50% of the time large by 100K-500K per .MTS file, them the other camcorder.
After checking frame count per the posting, on four .MTS files that were larger, the frame counts are equal. It must have something to do with images them.
Well, that certainly adds more flesh to the bones. This is way outside my technical comfort zone. Maybe others would want to chip in now, now we know a wee bit more.
Have you checked that both cameras are set to exactly the same recording resolution/quality? If not, the file sizes in bytes will differ significantly. Nevertheless, the time lengths of the videos should be about the same if you started and stopped the two cameras at the same time.
Since left/right camera will see slightly different images, the video size will not be the same. The compression amount, especially with long-GOP HDV and AVCHD compression, is different depending on the image. So, don't sweat the file size differences. Just go do your work and forget about the differences in file sizes. They are normal.